I wonder how strong those winds were.
“I wonder how strong those winds were.”
Not strong enough to blow those people away.
The question is how fresh was the concrete?
Very, It looks like.
Don’t they need a week or so to be full strength?
I Found this:
https://www.powerblanket.com/blog/long-concrete-take-set/
Curing Time for Concrete. In standard industrial cases,
full strength concrete is recognized at 28 days. At seven
days, you should have concrete that is cured to 70% full
strength or greater. But to answer the question of, “How
long does concrete take to set?” concrete setting time is
generally 24 to 48 hours.
~Easy